Features: 100V/250V/500V/1000V rated test voltage, with a measurement range of up to 2000M and capable of measuring AC voltage. Wide measurement range with locking button for easy selection and operation. Measures AC voltage up to 500V with full scale linear indication. Low resistance buzzer alarm alerts users for improved safety and awareness. Battery voltage indicator light (BATT CHECK) also functions as a high voltage indicator during megohmmeter operation. Includes external DC power supply (charging) socket for added convenience. Widened dial design provides broader indication range and more accurate fault diagnosis. Dial illumination function enables clear readings in low-light environments. Automatic discharge function activates after measurement to prevent electric shock from residual charges. Strong output load capacity with maximum output short-circuit current of 0.55mA. Features transistor withstand voltage measurement scale for direct reading of material withstand voltage (load voltage). Fully functional with high accuracy, offering convenient and reliable operationideal for professional electrical testing. Includes a pair of test leads with alligator clips and a durable zipper storage bag. Designed to measure insulation resistance of various electrical equipment and materials such as transformers, motors, cables, switches, and appliances; suitable for maintenance, testing, and verification of electrical systems. Specifications: Material: ABS Rated Test Voltage: 100V/250V/500V/1000V Output Voltage: 90120% of rated test voltage Output Short Circuit Current: Max. 0.55mA Measurement Range: 02000M Transistor Withstand Voltage Measurement: 1001000V (0.5mA) Discharge Resistance: 500k5M Automatic Alarm Threshold: 50M Operating Temperature/Humidity: 040C, 80% RH